I know which one you’re asking about, I won’t link it as it’s a terrible site(often wrong, everything is couched in alarmism terminology). You are so much better off using the link provided by object, it’s provided by the Electronic Frontier, it’s very accurate and it explains every aspect of a data point without trying to scare you with factless blurbs of nonsense.

https://coveryourtracks.eff.org/